First, the lightening process is essential. You should have an evenly-lighted hair before you can begin to apply the rainbow-colored makeup. This step may take several steps, but it’s worth the wait. The next step is coloring, and you want your hair to be as even as possible. This will take a while, so you’ll want to allow plenty of time for your stylist to apply the rainbow colors. The more colors you use, the more time it will take. This is important because you want the colors to stay crisp and defined.